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-rw-r--r--arch/sparc64/kernel/process.c594
1 files changed, 594 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c
new file mode 100644
index 000000000..5ec62a6b6
--- /dev/null
+++ b/arch/sparc64/kernel/process.c
@@ -0,0 +1,594 @@
+/* $Id: process.c,v 1.6 1997/04/07 18:57:07 jj Exp $
+ * arch/sparc64/kernel/process.c
+ *
+ * Copyright (C) 1995, 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
+ * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+/*
+ * This file handles the architecture-dependent parts of process handling..
+ */
+
+#define __KERNEL_SYSCALLS__
+#include <stdarg.h>
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/malloc.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/config.h>
+#include <linux/reboot.h>
+
+#include <asm/oplib.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/delay.h>
+#include <asm/processor.h>
+#include <asm/pstate.h>
+#include <asm/elf.h>
+#include <asm/fpumacro.h>
+
+#ifndef __SMP__
+
+/*
+ * the idle loop on a Sparc... ;)
+ */
+asmlinkage int sys_idle(void)
+{
+ if (current->pid != 0)
+ return -EPERM;
+
+ /* endless idle loop with no priority at all */
+ current->counter = -100;
+ for (;;)
+ schedule();
+ return 0;
+}
+
+#else
+
+/*
+ * the idle loop on a UltraMultiPenguin...
+ */
+asmlinkage int sys_idle(void)
+{
+ if (current->pid != 0)
+ return -EPERM;
+
+ /* endless idle loop with no priority at all */
+ current->counter = -100;
+ schedule();
+ return 0;
+}
+
+/* This is being executed in task 0 'user space'. */
+int cpu_idle(void *unused)
+{
+ volatile int *spap = &smp_process_available;
+ volatile int cval;
+
+ while(1) {
+ if(0==*spap)
+ continue;
+ cli();
+ /* Acquire exclusive access. */
+ while((cval = smp_swap(spap, -1)) == -1)
+ while(*spap == -1)
+ ;
+ if (0==cval) {
+ /* ho hum, release it. */
+ *spap = 0;
+ sti();
+ continue;
+ }
+ /* Something interesting happened, whee... */
+ *spap = (cval - 1);
+ sti();
+ idle();
+ }
+}
+
+#endif
+
+extern char reboot_command [];
+
+#ifdef CONFIG_SUN_CONSOLE
+extern void console_restore_palette (void);
+extern int serial_console;
+#endif
+
+void machine_halt(void)
+{
+ sti();
+ udelay(8000);
+ cli();
+#ifdef CONFIG_SUN_CONSOLE
+ if (!serial_console)
+ console_restore_palette ();
+#endif
+ prom_halt();
+ panic("Halt failed!");
+}
+
+void machine_restart(char * cmd)
+{
+ char *p;
+
+ sti();
+ udelay(8000);
+ cli();
+
+ p = strchr (reboot_command, '\n');
+ if (p) *p = 0;
+#ifdef CONFIG_SUN_CONSOLE
+ if (!serial_console)
+ console_restore_palette ();
+#endif
+ if (cmd)
+ prom_reboot(cmd);
+ if (*reboot_command)
+ prom_reboot(reboot_command);
+ prom_feval ("reset");
+ panic("Reboot failed!");
+}
+
+void machine_power_off(void)
+{
+ machine_halt();
+}
+
+void show_regwindow(struct reg_window *rw)
+{
+ printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n",
+ rw->locals[0], rw->locals[1], rw->locals[2], rw->locals[3]);
+ printk("l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
+ rw->locals[4], rw->locals[5], rw->locals[6], rw->locals[7]);
+ printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n",
+ rw->ins[0], rw->ins[1], rw->ins[2], rw->ins[3]);
+ printk("i4: %016lx i5: %016lx i6: %016lx i7: %016lx\n",
+ rw->ins[4], rw->ins[5], rw->ins[6], rw->ins[7]);
+}
+
+void show_regwindow32(struct reg_window32 *rw)
+{
+ printk("l0: %08x l1: %08x l2: %08x l3: %08x\n"
+ "l4: %08x l5: %08x l6: %08x l7: %08x\n",
+ rw->locals[0], rw->locals[1], rw->locals[2], rw->locals[3],
+ rw->locals[4], rw->locals[5], rw->locals[6], rw->locals[7]);
+ printk("i0: %08x i1: %08x i2: %08x i3: %08x\n"
+ "i4: %08x i5: %08x i6: %08x i7: %08x\n",
+ rw->ins[0], rw->ins[1], rw->ins[2], rw->ins[3],
+ rw->ins[4], rw->ins[5], rw->ins[6], rw->ins[7]);
+}
+
+void show_stackframe(struct sparc_stackf *sf)
+{
+ unsigned long size;
+ unsigned long *stk;
+ int i;
+
+ printk("l0: %016lx l1: %016lx l2: %016lx l3: %016lx\n"
+ "l4: %016lx l5: %016lx l6: %016lx l7: %016lx\n",
+ sf->locals[0], sf->locals[1], sf->locals[2], sf->locals[3],
+ sf->locals[4], sf->locals[5], sf->locals[6], sf->locals[7]);
+ printk("i0: %016lx i1: %016lx i2: %016lx i3: %016lx\n"
+ "i4: %016lx i5: %016lx fp: %016lx ret_pc: %016lx\n",
+ sf->ins[0], sf->ins[1], sf->ins[2], sf->ins[3],
+ sf->ins[4], sf->ins[5], (unsigned long)sf->fp, sf->callers_pc);
+ printk("sp: %016lx x0: %016lx x1: %016lx x2: %016lx\n"
+ "x3: %016lx x4: %016lx x5: %016lx xx: %016lx\n",
+ (unsigned long)sf->structptr, sf->xargs[0], sf->xargs[1],
+ sf->xargs[2], sf->xargs[3], sf->xargs[4], sf->xargs[5],
+ sf->xxargs[0]);
+ size = ((unsigned long)sf->fp) - ((unsigned long)sf);
+ size -= STACKFRAME_SZ;
+ stk = (unsigned long *)((unsigned long)sf + STACKFRAME_SZ);
+ i = 0;
+ do {
+ printk("s%d: %016lx\n", i++, *stk++);
+ } while ((size -= sizeof(unsigned long)));
+}
+
+void show_stackframe32(struct sparc_stackf32 *sf)
+{
+ unsigned long size;
+ unsigned *stk;
+ int i;
+
+ printk("l0: %08x l1: %08x l2: %08x l3: %08x\n",
+ sf->locals[0], sf->locals[1], sf->locals[2], sf->locals[3]);
+ printk("l4: %08x l5: %08x l6: %08x l7: %08x\n",
+ sf->locals[4], sf->locals[5], sf->locals[6], sf->locals[7]);
+ printk("i0: %08x i1: %08x i2: %08x i3: %08x\n",
+ sf->ins[0], sf->ins[1], sf->ins[2], sf->ins[3]);
+ printk("i4: %08x i5: %08x fp: %08x ret_pc: %08x\n",
+ sf->ins[4], sf->ins[5], sf->fp, sf->callers_pc);
+ printk("sp: %08x x0: %08x x1: %08x x2: %08x\n"
+ "x3: %08x x4: %08x x5: %08x xx: %08x\n",
+ sf->structptr, sf->xargs[0], sf->xargs[1],
+ sf->xargs[2], sf->xargs[3], sf->xargs[4], sf->xargs[5],
+ sf->xxargs[0]);
+ size = ((unsigned long)sf->fp) - ((unsigned long)sf);
+ size -= STACKFRAME32_SZ;
+ stk = (unsigned *)((unsigned long)sf + STACKFRAME32_SZ);
+ i = 0;
+ do {
+ printk("s%d: %08x\n", i++, *stk++);
+ } while ((size -= sizeof(unsigned)));
+}
+
+void show_regs(struct pt_regs * regs)
+{
+#if __MPP__
+ printk("CID: %d\n",mpp_cid());
+#endif
+ printk("TSTATE: %016lx TPC: %016lx TNPC: %016lx Y: %016lx\n", regs->tstate,
+ regs->tpc, regs->tnpc, regs->y);
+ printk("g0: %016lx g1: %016lx g2: %016lx g3: %016lx\n",
+ regs->u_regs[0], regs->u_regs[1], regs->u_regs[2],
+ regs->u_regs[3]);
+ printk("g4: %016lx g5: %016lx g6: %016lx g7: %016lx\n",
+ regs->u_regs[4], regs->u_regs[5], regs->u_regs[6],
+ regs->u_regs[7]);
+ printk("o0: %016lx o1: %016lx o2: %016lx o3: %016lx\n",
+ regs->u_regs[8], regs->u_regs[9], regs->u_regs[10],
+ regs->u_regs[11]);
+ printk("o4: %016lx o5: %016lx sp: %016lx ret_pc: %016lx\n",
+ regs->u_regs[12], regs->u_regs[13], regs->u_regs[14],
+ regs->u_regs[15]);
+#if 0
+ show_regwindow((struct reg_window *)(regs->u_regs[14] + STACK_BIAS));
+#endif
+}
+
+void show_regs32(struct pt_regs32 *regs)
+{
+#if __MPP__
+ printk("CID: %d\n",mpp_cid());
+#endif
+ printk("PSR: %08x PC: %08x NPC: %08x Y: %08x\n", regs->psr,
+ regs->pc, regs->npc, regs->y);
+ printk("g0: %08x g1: %08x g2: %08x g3: %08x\n",
+ regs->u_regs[0], regs->u_regs[1], regs->u_regs[2],
+ regs->u_regs[3]);
+ printk("g4: %08x g5: %08x g6: %08x g7: %08x\n",
+ regs->u_regs[4], regs->u_regs[5], regs->u_regs[6],
+ regs->u_regs[7]);
+ printk("o0: %08x o1: %08x o2: %08x o3: %08x\n",
+ regs->u_regs[8], regs->u_regs[9], regs->u_regs[10],
+ regs->u_regs[11]);
+ printk("o4: %08x o5: %08x sp: %08x ret_pc: %08x\n",
+ regs->u_regs[12], regs->u_regs[13], regs->u_regs[14],
+ regs->u_regs[15]);
+ show_regwindow32((struct reg_window32 *)((unsigned long)regs->u_regs[14]));
+}
+
+void show_thread(struct thread_struct *tss)
+{
+ int i;
+
+#if 0
+ printk("kregs: 0x%016lx\n", (unsigned long)tss->kregs);
+ show_regs(tss->kregs);
+#endif
+ printk("sig_address: 0x%016lx\n", tss->sig_address);
+ printk("sig_desc: 0x%016lx\n", tss->sig_desc);
+ printk("ksp: 0x%016lx\n", tss->ksp);
+ printk("kpc: 0x%016lx\n", tss->kpc);
+
+ for (i = 0; i < NSWINS; i++) {
+ if (!tss->rwbuf_stkptrs[i])
+ continue;
+ printk("reg_window[%d]:\n", i);
+ printk("stack ptr: 0x%016lx\n", tss->rwbuf_stkptrs[i]);
+ show_regwindow(&tss->reg_window[i]);
+ }
+ printk("w_saved: 0x%08lx\n", tss->w_saved);
+
+ /* XXX missing: float_regs */
+ printk("fsr: 0x%016lx\n", tss->fsr);
+
+ printk("sstk_info.stack: 0x%016lx\n",
+ (unsigned long)tss->sstk_info.the_stack);
+ printk("sstk_info.status: 0x%016lx\n",
+ (unsigned long)tss->sstk_info.cur_status);
+ printk("flags: 0x%016lx\n", tss->flags);
+ printk("current_ds: 0x%016x\n", tss->current_ds);
+
+ /* XXX missing: core_exec */
+}
+
+/*
+ * Free current thread data structures etc..
+ */
+void exit_thread(void)
+{
+#ifndef __SMP__
+ if(last_task_used_math == current) {
+#else
+ if(current->flags & PF_USEDFPU) {
+#endif
+#ifndef __SMP__
+ last_task_used_math = NULL;
+#else
+ current->flags &= ~PF_USEDFPU;
+#endif
+ }
+}
+
+void flush_thread(void)
+{
+ current->tss.w_saved = 0;
+ current->tss.sstk_info.cur_status = 0;
+ current->tss.sstk_info.the_stack = 0;
+
+ /* No new signal delivery by default */
+ current->tss.new_signal = 0;
+#ifndef __SMP__
+ if(last_task_used_math == current) {
+#else
+ if(current->flags & PF_USEDFPU) {
+#endif
+#ifndef __SMP__
+ last_task_used_math = NULL;
+#else
+ current->flags &= ~PF_USEDFPU;
+#endif
+ }
+
+ /* Now, this task is no longer a kernel thread. */
+ current->tss.flags &= ~SPARC_FLAG_KTHREAD;
+ current->tss.current_ds = USER_DS;
+}
+
+static __inline__ void copy_regs(struct pt_regs *dst, struct pt_regs *src)
+{
+ __asm__ __volatile__("ldd\t[%1 + 0x00], %%g2\n\t"
+ "ldd\t[%1 + 0x08], %%g4\n\t"
+ "ldd\t[%1 + 0x10], %%o4\n\t"
+ "std\t%%g2, [%0 + 0x00]\n\t"
+ "std\t%%g4, [%0 + 0x08]\n\t"
+ "std\t%%o4, [%0 + 0x10]\n\t"
+ "ldd\t[%1 + 0x18], %%g2\n\t"
+ "ldd\t[%1 + 0x20], %%g4\n\t"
+ "ldd\t[%1 + 0x28], %%o4\n\t"
+ "std\t%%g2, [%0 + 0x18]\n\t"
+ "std\t%%g4, [%0 + 0x20]\n\t"
+ "std\t%%o4, [%0 + 0x28]\n\t"
+ "ldd\t[%1 + 0x30], %%g2\n\t"
+ "ldd\t[%1 + 0x38], %%g4\n\t"
+ "ldd\t[%1 + 0x40], %%o4\n\t"
+ "std\t%%g2, [%0 + 0x30]\n\t"
+ "std\t%%g4, [%0 + 0x38]\n\t"
+ "ldd\t[%1 + 0x48], %%g2\n\t"
+ "std\t%%o4, [%0 + 0x40]\n\t"
+ "std\t%%g2, [%0 + 0x48]\n\t" : :
+ "r" (dst), "r" (src) :
+ "g2", "g3", "g4", "g5", "o4", "o5");
+}
+
+static __inline__ void copy_regwin(struct reg_window *dst, struct reg_window *src)
+{
+ __asm__ __volatile__("ldd\t[%1 + 0x00], %%g2\n\t"
+ "ldd\t[%1 + 0x08], %%g4\n\t"
+ "ldd\t[%1 + 0x10], %%o4\n\t"
+ "std\t%%g2, [%0 + 0x00]\n\t"
+ "std\t%%g4, [%0 + 0x08]\n\t"
+ "std\t%%o4, [%0 + 0x10]\n\t"
+ "ldd\t[%1 + 0x18], %%g2\n\t"
+ "ldd\t[%1 + 0x20], %%g4\n\t"
+ "ldd\t[%1 + 0x28], %%o4\n\t"
+ "std\t%%g2, [%0 + 0x18]\n\t"
+ "std\t%%g4, [%0 + 0x20]\n\t"
+ "std\t%%o4, [%0 + 0x28]\n\t"
+ "ldd\t[%1 + 0x30], %%g2\n\t"
+ "ldd\t[%1 + 0x38], %%g4\n\t"
+ "std\t%%g2, [%0 + 0x30]\n\t"
+ "std\t%%g4, [%0 + 0x38]\n\t" : :
+ "r" (dst), "r" (src) :
+ "g2", "g3", "g4", "g5", "o4", "o5");
+}
+
+static __inline__ struct sparc_stackf *
+clone_stackframe(struct sparc_stackf *dst, struct sparc_stackf *src)
+{
+ struct sparc_stackf *sp;
+
+#if 0
+ unsigned long size;
+ size = ((unsigned long)src->fp) - ((unsigned long)src);
+ sp = (struct sparc_stackf *)(((unsigned long)dst) - size);
+
+ if (copy_to_user(sp, src, size))
+ return 0;
+ if (put_user(dst, &sp->fp))
+ return 0;
+#endif
+ return sp;
+}
+
+
+/* Copy a Sparc thread. The fork() return value conventions
+ * under SunOS are nothing short of bletcherous:
+ * Parent --> %o0 == childs pid, %o1 == 0
+ * Child --> %o0 == parents pid, %o1 == 1
+ *
+ * NOTE: We have a separate fork kpsr/kwim because
+ * the parent could change these values between
+ * sys_fork invocation and when we reach here
+ * if the parent should sleep while trying to
+ * allocate the task_struct and kernel stack in
+ * do_fork().
+ */
+extern void ret_from_syscall(void);
+
+int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
+ struct task_struct *p, struct pt_regs *regs)
+{
+ struct pt_regs *childregs;
+ struct reg_window *new_stack, *old_stack;
+ unsigned long stack_offset;
+
+#if 0
+#ifndef __SMP__
+ if(last_task_used_math == current) {
+#else
+ if(current->flags & PF_USEDFPU) {
+#endif
+ put_psr(get_psr() | PSR_EF);
+ fpsave(&p->tss.float_regs[0], &p->tss.fsr);
+#ifdef __SMP__
+ current->flags &= ~PF_USEDFPU;
+#endif
+ }
+#endif
+
+ /* Calculate offset to stack_frame & pt_regs */
+ stack_offset = (PAGE_SIZE - TRACEREG_SZ);
+
+ if(regs->tstate & TSTATE_PRIV)
+ stack_offset -= REGWIN_SZ;
+
+ childregs = ((struct pt_regs *) (p->kernel_stack_page + stack_offset));
+ *childregs = *regs;
+ new_stack = (((struct reg_window *) childregs) - 1);
+ old_stack = (((struct reg_window *) regs) - 1);
+ *new_stack = *old_stack;
+
+ p->saved_kernel_stack = ((unsigned long) new_stack);
+ p->tss.ksp = p->saved_kernel_stack - STACK_BIAS;
+ p->tss.kpc = ((unsigned long) ret_from_syscall) - 0x8;
+ p->tss.kregs = childregs;
+
+ /* Don't look... */
+ p->tss.cwp = regs->u_regs[UREG_G0];
+
+ /* tss.wstate was copied by do_fork() */
+
+ if(regs->tstate & TSTATE_PRIV) {
+ childregs->u_regs[UREG_FP] = p->tss.ksp;
+ p->tss.flags |= SPARC_FLAG_KTHREAD;
+ p->tss.current_ds = KERNEL_DS;
+ childregs->u_regs[UREG_G6] = (unsigned long) p;
+ } else {
+ childregs->u_regs[UREG_FP] = sp;
+ p->tss.flags &= ~SPARC_FLAG_KTHREAD;
+ p->tss.current_ds = USER_DS;
+
+#if 0
+ if (sp != current->tss.kregs->u_regs[UREG_FP]) {
+ struct sparc_stackf *childstack;
+ struct sparc_stackf *parentstack;
+
+ /*
+ * This is a clone() call with supplied user stack.
+ * Set some valid stack frames to give to the child.
+ */
+ childstack = (struct sparc_stackf *)sp;
+ parentstack = (struct sparc_stackf *)
+ current->tss.kregs->u_regs[UREG_FP];
+
+#if 0
+ printk("clone: parent stack:\n");
+ show_stackframe(parentstack);
+#endif
+
+ childstack = clone_stackframe(childstack, parentstack);
+ if (!childstack)
+ return -EFAULT;
+
+#if 0
+ printk("clone: child stack:\n");
+ show_stackframe(childstack);
+#endif
+
+ childregs->u_regs[UREG_FP] = (unsigned long)childstack;
+ }
+#endif
+ }
+
+ /* Set the return value for the child. */
+ childregs->u_regs[UREG_I0] = current->pid;
+ childregs->u_regs[UREG_I1] = 1;
+
+ /* Set the return value for the parent. */
+ regs->u_regs[UREG_I1] = 0;
+#if 0
+ printk("CHILD register dump\n");
+ show_regs(childregs);
+ show_regwindow(new_stack);
+ while(1)
+ barrier();
+#endif
+ return 0;
+}
+
+/*
+ * fill in the user structure for a core dump..
+ */
+void dump_thread(struct pt_regs * regs, struct user * dump)
+{
+#if 0
+ unsigned long first_stack_page;
+ dump->magic = SUNOS_CORE_MAGIC;
+ dump->len = sizeof(struct user);
+ dump->regs.psr = regs->psr;
+ dump->regs.pc = regs->pc;
+ dump->regs.npc = regs->npc;
+ dump->regs.y = regs->y;
+ /* fuck me plenty */
+ memcpy(&dump->regs.regs[0], &regs->u_regs[1], (sizeof(unsigned long) * 15));
+ dump->uexec = current->tss.core_exec;
+ dump->u_tsize = (((unsigned long) current->mm->end_code) -
+ ((unsigned long) current->mm->start_code)) & ~(PAGE_SIZE - 1);
+ dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1)));
+ dump->u_dsize -= dump->u_tsize;
+ dump->u_dsize &= ~(PAGE_SIZE - 1);
+ first_stack_page = (regs->u_regs[UREG_FP] & ~(PAGE_SIZE - 1));
+ dump->u_ssize = (TASK_SIZE - first_stack_page) & ~(PAGE_SIZE - 1);
+ memcpy(&dump->fpu.fpstatus.fregs.regs[0], &current->tss.float_regs[0], (sizeof(unsigned long) * 32));
+ dump->fpu.fpstatus.fsr = current->tss.fsr;
+ dump->fpu.fpstatus.flags = dump->fpu.fpstatus.extra = 0;
+ dump->sigcode = current->tss.sig_desc;
+#endif
+}
+
+/*
+ * fill in the fpu structure for a core dump.
+ */
+int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
+{
+ /* Currently we report that we couldn't dump the fpu structure */
+ return 0;
+}
+
+/*
+ * sparc_execve() executes a new program after the asm stub has set
+ * things up for us. This should basically do what I want it to.
+ */
+asmlinkage int sparc_execve(struct pt_regs *regs)
+{
+ int error, base = 0;
+ char *filename;
+
+ /* Check for indirect call. */
+ if(regs->u_regs[UREG_G1] == 0)
+ base = 1;
+
+ error = getname((char *) regs->u_regs[base + UREG_I0], &filename);
+ if(error)
+ return error;
+ error = do_execve(filename, (char **) regs->u_regs[base + UREG_I1],
+ (char **) regs->u_regs[base + UREG_I2], regs);
+ putname(filename);
+ return error;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 06:44:38 +0000